แก้ไข

แชร์ผ่าน

RichTextBox.CanPaste(DataFormats+Format) Method

  • Reference

Definition

Namespace:
System.Windows.Forms
Assembly:
System.Windows.Forms.dll
Source:
RichTextBox.cs
Source:
RichTextBox.cs
Source:
RichTextBox.cs

Determines whether you can paste information from the Clipboard in the specified data format.

public:
 bool CanPaste(System::Windows::Forms::DataFormats::Format ^ clipFormat);
public bool CanPaste (System.Windows.Forms.DataFormats.Format clipFormat);
member this.CanPaste : System.Windows.Forms.DataFormats.Format -> bool
Public Function CanPaste (clipFormat As DataFormats.Format) As Boolean

Parameters

clipFormat
DataFormats.Format

One of the DataFormats.Format values.

Returns

Boolean

true if you can paste data from the Clipboard in the specified data format; otherwise, false.

Examples

The following code example demonstrates how to use the Paste method to paste a bitmap into the RichTextBox control. After opening a bitmap from file, the example uses the SetDataObject method to copy the bitmap to the Windows clipboard. Finally, the example retrieves the format for the Bitmap object, uses the CanPaste method to verify that the format can be pasted into the RichTextBox control, and then uses the Paste method to paste the data.

private:
   bool pasteMyBitmap( String^ fileName )
   {
      // Open an bitmap from file and copy it to the clipboard.
      Bitmap^ myBitmap = gcnew Bitmap( fileName );

      // Copy the bitmap to the clipboard.
      Clipboard::SetDataObject( myBitmap );

      // Get the format for the object type.
      DataFormats::Format^ myFormat = DataFormats::GetFormat( DataFormats::Bitmap );

      // After verifying that the data can be pasted, paste it.
      if ( richTextBox1->CanPaste( myFormat ) )
      {
         richTextBox1->Paste( myFormat );
         return true;
      }
      else
      {
         MessageBox::Show( "The data format that you attempted to paste is not supported by this control." );
         return false;
      }
   }

private bool pasteMyBitmap(string fileName)
{

    // Open an bitmap from file and copy it to the clipboard.
    Bitmap myBitmap = new Bitmap(fileName);
            
    // Copy the bitmap to the clipboard.
    Clipboard.SetDataObject(myBitmap);

    // Get the format for the object type.
    DataFormats.Format myFormat = DataFormats.GetFormat(DataFormats.Bitmap);

    // After verifying that the data can be pasted, paste it.
    if(richTextBox1.CanPaste(myFormat))
    {
        richTextBox1.Paste(myFormat);
        return true;
    }
    else
    {
        MessageBox.Show("The data format that you attempted to paste is not supported by this control.");
        return false;
    }
}

Private Function PasteMyBitmap(ByVal Filename As String) As Boolean

    'Open an bitmap from file and copy it to the clipboard.
    Dim MyBitmap As Bitmap
    MyBitmap = Bitmap.FromFile(Filename)

    ' Copy the bitmap to the clipboard.
    Clipboard.SetDataObject(MyBitmap)

    ' Get the format for the object type.
    Dim MyFormat As DataFormats.Format = DataFormats.GetFormat(DataFormats.Bitmap)

    ' After verifying that the data can be pasted, paste it.
    If RichTextBox1.CanPaste(MyFormat) Then

        RichTextBox1.Paste(MyFormat)
        PasteMyBitmap = True

    Else

        MessageBox.Show("The data format that you attempted to paste is not supported by this control.")
        PasteMyBitmap = False

    End If


End Function

Remarks

You can use this method to determine whether the current contents of the Clipboard are in a specified Clipboard data format before enabling the user to paste the information into the RichTextBox control. For example, you could create an event handler for a Popup event of a paste command MenuItem and use this method to determine whether the paste MenuItem should be enabled based on the type of data in the Clipboard.

Applies to

See also